Abstract: The degree of effect of mind factors,suth as prior knowledge、learning strategy、intelligence and non-intellectual factors et al.,on academic achievement as well as its mechanism with junior high school pupils was examined with questionair method and scale method.The analyses of data revealed that :1)there were significant positive correlations between mainly mind factors and academic achivement;2) the direct factors led to pupils' differences on acadiemic achievement were prior knowledge、learning strategy and non-intellectual factors and the degree of effect of prior knowledge was obvously stronger than that of learning strategy and non-intellectual factors;3)an important indirect effect of intelligence and non-intellectual factors on academic achievement by prior knowledge,not by learning strategy,was found.

Key words: prior knowledge, learning strategy, intelligence, non-intellectual factors, academic achievement